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The World Of Triangles Free powerpoints at
Triangles A triangle is a 3- sided polygon. Every triangle has three sides and three angles. When added together, the three angles equal 180°.
Acute Triangles A triangle in which all three angles are less than 90°.
Obtuse Triangles An obtuse triangle is a triangle in which one of the angles is greater than 90°.
Right Triangles A right triangle is triangle with an angle of 90°.
Scalene Triangles A triangle with three unequal sides.
Isosceles Triangles An isosceles triangle is a triangle with (at least) two equal sides.
Isosceles Triangle Theorem The following movie shows that if two sides of a triangle are congruent, then the angles opposite those sides are congruent.
Equilateral Triangles An equilateral triangle is a triangle with all three sides of equal length.
Equiangular Triangles An equiangular triangle is a triangle which has three equal angles.
Congruent Triangles Congruent triangles are triangles whose corresponding angles and sides are congruent. They are exactly the same size and shape.
The Hypotenuse The hypotenuse of a right triangle is the triangle's longest side, i.e., the side opposite the right angle.
The Pythagorean Theorem For a right triangle with legs a and b and hypotenuse c, a 2 +b 2 =c 2.
Triangle Quiz Please complete the following quiz that covers the information that was just presented to you.
Question 1 If a triangle has three unequal sides it is a ______ triangle. A) Scalene B) Obtuse C) Isosceles Answer: A) Scalene
Question 2 A triangle which has three equal angles is a ______ triangle. A) Acute B) Equilateral C) Equiangular Answer: C) Equiangular
Question 3 A triangle with (at least) two equal sides is a ______ triangle. A) Scalene B) Isosceles C) Congruent Answer: B) Isosceles
Question 4 Two triangles that are equal are called ______ triangles A) Acute B) Obtuse C) Congruent Answer: C) Congruent
Question 5 A triangle with all three sides of equal length is a ______ triangle. A) Equilateral B) Right C) Equiangular Answer: A) Equilateral
Question 6 A triangle with an angle of 90° is a ______ triangle. A) Acute B) Right C) Congruent Answer: B) Right
Question 7 A triangle in which all three angles are less than 90° is a ______ triangle. A) Right B) Acute C) Scalene Answer: B) Acute
Question 8 A triangle in which one of the angles is greater than 90° is a ______ triangle. A) Obtuse B) Isosceles C) Acute Answer: A) Obtuse
Question 9 What is the Hypotenuse of a right triangle? A) The smallest angle. B) The side opposite the right angle. C) The right angle. Answer: B) The side opposite the right angle.
Question 10 The Pythagorean Theorem states … A) r 2 B) (a+b) 2 /2=c C) a 2 +b 2 =c 2 Answer: C) a 2 +b 2 =c 2
Question 11 Use the Pythagorean Theorem to solve the following: a = 5 b = 12 c = ? Answer: c = 13
The World Of Triangles Mohamed Attia Mohamed copyrigh.mohamedattia blogspot.com.
The World Of Triangles. Triangles A triangle is a 3- sided polygon. Every triangle has three sides and three angles. When added together, the three angles.
Sec 5.1 The World Of Triangles. Objectives---What we’ll learn… Identify triangles by angles (Acute, Right & Obtuse) Identify triangles by sides (Scalene,
SPI Identify, describe and/or apply the relationships and theorems involving different types of triangles, quadrilaterals and other polygons.
Angles and their measurements. Degrees: Measuring Angles We measure the size of an angle using degrees. Example: Here are some examples of angles and.
Triangle Song - YouTube Triangle Song - YouTube.
The World Of Triangles Juliána Melicherová University of Pavol Jozef Šafárik, Košice.
Triangles Report by Jennifer Johnson. What is a Triangle? A polygon Three sides Three angles.
TRIANGLES AND TYPES OF TRIANGLES. A triangle has three sides.
Scalene triangle: A scalene triangle is a triangle that has no equal sides. The following is a scalene triangle.
Triangles 1 The Basics. 2 Naming Triangles For example, we can call the following triangle: Triangles are named by using its vertices. ∆ABC∆BAC ∆CAB∆CBA∆BCA.
Triangle A polygon with three sides and three angles. A triangle can be names by its’ side lengths and angles. – Side lengths: isosceles, equilateral,
Triangles. A triangle is a polygon with three sides.
Draw the following: 1. acute triangle 2.right triangle 3.obtuse triangle 4. acute, scalene triangle 5.obtuse, isosceles triangle 6. right, scalene.
Geometry Triangles What is a Triangle? A three sided convex polygon. A three sided convex polygon. Its three segments are called sides. Its three segments.
Triangles: Angle Sum & Classifying Triangles Tutorial 12b.
1Geometry Lesson: Polygons, Triangles Aim: Do Now: 2) Which of the following shapes are polygons? e) a) b) c) d) f) What are polygons? How do we classify.
TRIANGLES CLASSIFICATIONS, ANGLES AND MORE!! Free powerpoints at
Name the Angle in four different ways 1) Use the vertex and a point from each side. ABC or CBA The vertex letter is always in the middle. 2) Use the vertex.
Two rays with a common endpoint form an angle Two angles are supplementary if they add up to 180° - forming a straight line Two angles are complimentary.
Classify Triangles Standard 4C. What is a Triangle? A triangle is a polygon with 3 sides. A triangle can be formed from three line segments if and only.
Blue – 2/23/2015 Gold – 2/24/ Name 2 pair of alternate interior angles 5 & 3 and 4 & 1 2. What is the sum of m 1 + m 2 + m 3? 180°
Classify triangles by sides No congruent sides Scalene triangle At least two sides congruent Isosceles triangle Three congruent sides Equilateral triangle.
Classifying Triangles How many degrees can be found in all triangles? 180 We can classify triangles 2 ways: By their angles By their sides.
They come in many shapes and sizes! 3 measure angles –Acute –Right –Obtuse 3 measure sides –Scalene –Isosceles –Equilateral There are 6 types of triangles.
1 Isosceles and Equilateral Triangles. 2 Parts of an Isosceles Triangle An isosceles triangle is a triangle with two congruent sides. The congruent sides.
Pythagorean Theorem – In a right triangle, the square of the hypotenuse is equal to the sum of the squares of the two legs. a b c a 2 + b 2 = c 2.
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