The correct answer is 2x(5x^2+4x-3)
okay so
117° + angle a = 180° (supplementary angle)
angle a = 180 - 117
= 63°
then angle a + angle b + 81° = 180° ( angle sum property)
so... 63° + angle b + 81° = 180
144 + angle b = 180°
angle b = 180 - 144
= 36°
hope this helps.
Since the radius is 12, the equation is
.. x^2 +y^2 = 144
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❖ You can use the equation 16 ÷ 12 = 1.33
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