If A Semicircle Has A Diameter Of 20 Cm, What Is Its Arc Length? , A.31.42 Cm , B.21.34 Cm , C.40 Cm

If a semicircle has a diameter of 20 cm, what is its arc length?

a.31.42 cm
b.21.34 cm
c.40 cm
d.41.50 cm

 

Answer:

LETTER A (31.42 cm)

Step-by-step explanation:

Formula

• Arc length = (θ/360)πd

Given:

• Semi circle or 180°
• π ≈ 3.1415
• d = 20 cm

Plugging the values , we get

• Arc length = (θ/360)πd
• Arc length = (180/360)(3.1415)(20)
• Arc length = (1/2)(3.1415)(20)
• Arc length = 31.415 or 31.42

Therefore , the arc length is 31.42 cm