Area of Plane Figure and Sector Area of a Circle

Front

What is the formula for the area of a rectangle?

Back

Area = length × width

Front

How do you calculate the area of a triangle?

Back

Area = 1/2 × base × height

Front

What is the formula for the area of a circle?

Back

Area = π × radius²

Front

Define a sector of a circle.

Back

A sector is a portion of a circle enclosed by two radii and the arc between them.

Front

How do you find the area of a sector?

Back

Area of sector = (θ/360) × π × radius², where θ is the angle in degrees.

Front

What is the relationship between the diameter and radius of a circle?

Back

Diameter = 2 × radius.

Front

What is the formula for the area of a parallelogram?

Back

Area = base × height

Front

How do you find the area of a trapezoid?

Back

Area = 1/2 × (base1 + base2) × height

Front

What is the formula for the area of a rhombus?

Back

Area = (diagonal1 × diagonal2) / 2

Front

If the perimeter of a rhombus is 52 meters, what is the length of one side?

Back

Length of one side = Perimeter / 4 = 52m / 4 = 13m.