Unit 1 Spotcheck

Front

What is the formula for arc length?

Back

Arc Length = (θ/360) * 2πr, where θ is the angle in degrees and r is the radius.

Front

How do you calculate the area of a sector?

Back

Area of a Sector = (θ/360) * πr², where θ is the angle in degrees and r is the radius.

Front

What is the area of a circle?

Back

Area = πr², where r is the radius of the circle.

Front

What is the formula for the area of a composite figure?

Back

Area of Composite Figure = Sum of the areas of all individual shapes that make up the figure.

Front

How do you find the area of a rectangle?

Back

Area = length × width.

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

What is the relationship between radius and diameter?

Back

Diameter = 2 × Radius.

Front

What is the formula for the area of a triangle?

Back

Area = (1/2) × base × height.

Front

How do you convert degrees to radians?

Back

Radians = Degrees × (π/180).

Front

What is the definition of a sector in a circle?

Back

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