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The semicircle below has a diameter of 20, find the area of the blue region

 

 Jul 1, 2022

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The semicircle below has a diameter of 20, find the area of the blue region  

 

The area of the blue region is the area of the semicircle minus the area of the big triangle.  

 

Asemicircle  =  (1/2) • π • r2  =  (1/2) • (3.14) • (100)  =  157    

 

Alargetriangle  =  (1/2) • base • height  =  (1/2) • (20) • (10)  = 100   

 

Ablueregion  =  157 – 100  =  57 square units   

.

 Jul 1, 2022
 #1
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+1
Best Answer

 

The semicircle below has a diameter of 20, find the area of the blue region  

 

The area of the blue region is the area of the semicircle minus the area of the big triangle.  

 

Asemicircle  =  (1/2) • π • r2  =  (1/2) • (3.14) • (100)  =  157    

 

Alargetriangle  =  (1/2) • base • height  =  (1/2) • (20) • (10)  = 100   

 

Ablueregion  =  157 – 100  =  57 square units   

.

Guest Jul 1, 2022

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