9. What is the area of the region left if three equilateral triangles are cut off from a semi circle of radius 4cm? *

Step-by-step explanation:

For the equilateral triangle in a semicircle of radius 4cm.

Side Lengths =4cm

Angles =60 degrees

Therefore, the area of one equilateral triangle

Area of the three equilateral triangle

Area of the semicircle

Therefore, the area left over =Area of Semicircle -Area of Triangles

=25.1327-20.7846

=

angle addition postulate

2x=56

step-by-step explanation:

replace   with   27   and simplify.

10 , 27 , 10 , 70 , 10 , 35 , 10 , 48

step-by-step explanation: