Area and perimeter- chapter 14

What is the perimeter of a square equal to?

Perimeter= 4(side)

What is the area of a square equal to?

Area= side²

What is the perimeter of a rectangle equal to?

Perimeter= 2L + 2B or 2(L+B)

What is the area of a rectangle equal to?

Area= L x B

What is the perimeter of a triangle equal to?

Perimeter= Side 1 + Side 2 + Side 3

What does the perimeter of an isosceles triangle equal to?

Perimeter= 2(Side 1) + Side 2

What is the area of a triangle equal to?

Area= ½ (base)(perpendicular height)

What is the perimeter of an equilateral triangle equal to?

Perimeter= 3(side)

State an important note regarding the drawing of the perpendicular height of a triangle

It can be drawn from any vertex of the triangle.

What is the temu version of the perimeter for a circle.

Circumference

What da hell is a diameter?

A line passing through the center and joining two points on the circle. It divides the circle into two semi-circles.

What da hell is a radius?

A line from the center to a point on the circle

What is an arc?

A portion of the circumference of a circle.

What is a sector?

The area bounded by two radii and an arc(like a nice nice pizza slice—>that’s a bar.)

What is the circumference of a circle equal to?

C= 2(pi)(radius)

OR

C= (pi)(diameter) OR pi= C/d

What is the area for a circle equal to?

Area= (pi)(radius)²

What is a semi-circle circle?

A HALF OF A FULL CIRCLE, how u doin?(say this when you answer)

What is a quarter-circle?

The quarter of a full circle.

What is the perimeter of a semicircle equal to?

C= ½ [2(pi)(radius)] = (pi)(radius)

What happens IF the diameter is a solid line of a half circle?

It forms part of the perimeter and the formula becomes—C= (pi)(radius) + diameter

What is the area of a semicircle equal to?

Area= ½ (pi)(radius)²

What is the perimeter of a quarter-circle equal to?

C= ¼ [2(pi)(radius)]

What happens IF the radii are solid lines in a quarter circle

They form part of the circumference, and it becomes equal to:

C= ¼ [2(pi)(radius)] + radius + radius

What is the area of a quarter-circle equal to?

Area= ¼ (pi)(radius)²