asmith219771
27.06.2019 •
Mathematics
Δabc is an equilateral triangle. m∠a = (3x - 12)°. solve for x. a) 14 b) 19 c) 20 d) 24
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Ответ:
option (d)
Step-by-step explanation:
An equilateral triangle is a triangle whose all the sides are equal and all the angles are same.
There are three angles in a triangle and the according to the property of the angles of a triangle, the angle sum of a triangle is 180°.
So, in an equilateral triangle, the measure of each angle is 60°.
3x = 60 + 12
3x = 72
x = 24
option (d)
Ответ:
i dont know
Step-by-step explanation: