Math Q4_1

The formula for the area of a parallelogram can be used to derive the formula for the area of a circle. Is this correct?

• No

• Yes

• Maybe

Which will resemble the shape formed if the identical sectors of a circle are arranged in one row?

• triangle

• trapezoid

• parallelogram

Half of the circle goes to the top of the parallelogram, and the other half goes to the bottom. What part of a parallelogram is this?

• side

• base

• height

Which is equal to the base if a circle is made into parallelogram?

• 𝑟

• 𝜋𝑥r

• 𝑏 × ℎ

The sectors of a circle are arranged to resemble a parallelogram. Which part of the circle approximates the height of the parallelogram?

• radius

• diameter

• circumference

The sectors of a circle are arranged to resemble a parallelogram. Which part of the parallelogram approximates half of the circumference?

• base

• area

• height

If the formula for finding the area of a parallelogram is 𝐴 = 𝑏 𝑥 ℎ, what is the formula for the area of a circle?

• 𝐴 = 2 𝑥 𝜋 𝑥 𝑟

• 𝐴 = 𝜋 𝑥 𝑑

• 𝐴 = 𝜋 𝑥 𝑟 ²

Kaye will compute for the area of a circle using the formula 𝐴 = 𝜋 𝑥 𝑟 2 . If the given is the diameter of a circle, what should be computed first?

• base

• radius

• circumference

What is the area of a circle with a 5-meter radius? (Use 𝜋 = 3.14)

• 31.4 m²

• 78.5 m²

• 314 m²

What is the area of a circle with a radius of 2 m? (Use 𝜋 = 3.14)

• 6.28 m²

• 12.56 m²

• 50.24 m²