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The World Of Triangles Free powerpoints at http://www.worldofteaching.comhttp://www.worldofteaching.com
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. Triangles A triangle is a 3- sided polygon. Every triangle has three sides and three angles. When added together, the three angles.
The World Of Triangles Mohamed Attia Mohamed copyrigh.mohamedattia blogspot.com.
Sec 5.1 The World Of Triangles. Objectives---What we’ll learn… Identify triangles by angles (Acute, Right & Obtuse) Identify triangles by sides (Scalene,
Angles and their measurements. Degrees: Measuring Angles We measure the size of an angle using degrees. Example: Here are some examples of angles and.
SPI Identify, describe and/or apply the relationships and theorems involving different types of triangles, quadrilaterals and other polygons.
The World Of Triangles Juliána Melicherová University of Pavol Jozef Šafárik, Košice.
Triangle Song - YouTube Triangle Song - YouTube.
Classifying Triangles How many degrees can be found in all triangles? 180 We can classify triangles 2 ways: By their angles By their sides.
CLASSIFICATIONS, ANGLES AND MORE!!
Triangle A polygon with three sides and three angles. A triangle can be names by its’ side lengths and angles. – Side lengths: isosceles, equilateral,
Report by Jennifer Johnson
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.
Classify Triangles Standard 4C.
Triangles: Angle Sum & Classifying Triangles Tutorial 12b.
Scalene triangle: A scalene triangle is a triangle that has no equal sides. The following is a scalene triangle.
Find the value of x. 1. x + 2x + 3x = 180 6x = x + x + 40 = x + (x + 1) + 35 = x + 40 = 180 x = 70 3x + 36 = x = 48.
Classify triangles by sides No congruent sides Scalene triangle At least two sides congruent Isosceles triangle Three congruent sides Equilateral triangle.
Triangle Classification. Objectives Classify triangles by their angle and side measures Find the sum of the measure of the interior and exterior angles.
Angles and Triangles.
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