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1) area of equilateral triangle = √3/4 side²
= √3/4 (10)²
= √3/4(100)
= 100√3/4 cm²
2) If the measure of an angle is greater than 180° but less than 360°. This is known as reflex angle.
3) Let the angle be x
Let x= one of the angles
2x+21 = the other angle
The equation is
x + 2x +21 = 90
3x +21=90
3x = 69
x=23 degrees
2x+21 = 46+21 = 67 degrees
Therefore the first angle is 23 and the second one is 67
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tumhara last waal question ka answer
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