Review
Yes, it is a polygon
No, it has a curved side
Yes, it is a polygon
Hexagon, Convex
Dodecagon, Concave
Heptagon, Concave
Equilateral
None of These
Regular
1 2 Vertical Pair
160° Supplementary Angles 20°
1 2 Linear Pair
55° Complementary Angles 35°
1 2 Vertical Pair
60° Complementary Angles 30°
1 2 Linear Pair
90° Supplementary Angles 90°
Parallel Lines Perpendicular Lines
New Material
Complete the Triangle definition investigation on page 60 & 61.
A right triangle is a triangle that has one right angle
An acute triangle is a triangle that has three acute angles
An obtuse triangle is a triangle that has one obtuse angle
A scalene triangle is a triangle with no congruent sides
An equilateral triangle is a triangle that has three congruent sides
An isosceles triangle is a triangle that has at least two congruent sides
Base Base Angles Vertex angle Isosceles Triangle
Homework Page 62 #1-7, 17-21
Turn to page 64. We will work through each definition as a class.
A trapezoid is a quadrilateral with exactly one pair of parallel sides
A kite is a quadrilateral with two distinct pairs of consecutive congruent sides
A parallelogram is a quadrilateral with two pairs of parallel sides
A rhombus is an equilateral parallelogram
A rectangle is a parallelogram with four congruent angles
A square is an equilateral rectangle. A square is an equiangular rhombus. A square is a regular quadrilateral.
Homework: Page 62 #1-7, Page 66 #1-12