Shape A: Perimeter is obtained by adding all sides. Starting from the top side we have
Perimeter = 4 + 4 + 4 + 4 + 8 + 8 = 32
Shape A: The area of the given shape is equal to the area of the square of side 8 from which the area of the small square top right of side 4 is subtracted.
Area = 8 × 8 - 4 × 4 = 64 - 16 = 48
Shape B: Perimeter is obtained by adding all sides. Starting from the top side we have
Perimeter = 8 + 2 + 4 + 4 + 4 + 2 + 8 + 8 = 40
Shape B: The area of the given shape is equal to the area of the square (left side) of side 8 to which the area of the small square (right side) of side 4 is added.
Area = 8 × 8 + 4 × 4 = 64 + 16 = 80
Which of these is an isosceles triangle?
An isosceles triangle has two equal sides: shape B
Which pair of triangles are congruent?
Congruent shapes have sides of equal length: shapes A and C
Point O is the center of the circle below. What do you call the segments
A segment whose endpoints are on a circle is called a chord: AB is a chord
A chord that passes through the center of circle is called a diameter: CD is a diameter
A segment whose 2 endpoints are: 1) the center of circle and 2) one point on the circle is called the radius: OD is a radius