Vocabulary
The sum of the lengths of a shape's sides
What is perimeter?
P=4s
What is the equation for the perimeter of a square
Find the perimeter of the square I draw on the board.
12 cm
Find the area of the square I draw on the board.
9 cm²
Any side of a square
What is "s"?
The perimeter of a circle
What is circumference?
A=bh
What is the equation for the area of a rectangle/parallelogram?
Find the perimeter of the rectangle I draw on the board.
26 cm
The height of a rectangle or triangle
What is "h"
The number of square units (cm², in², m², etc.) enclosed in a shape. In other words, the size of the surface of a shape.
What is area?
A=s²
What is the equation for the area of a square?
Find the perimeter of the triangle I draw on the board.
43 in
The base of a rectangle or triangle.
What is "b"?
The straight line from the center to the circumference of a circle.
What is radius?
C=πd or C=2πr
What are the equations for the circumference of a circle?
Find the circumference of the circle I draw on the board.
75.36 cm or 24π cm
The diameter and radius of a circle.
What are "d" and "r"?
A straight line segment that passes through the center of a circle.
What is diameter?
A=πr²
What is the equation for the area of a circle?
Find the circumference of the circle I draw on the board.
21.98 ft or 7π ft
The hypotenuse of a right triangle.
What is "c"?