Question

The two angles of a triangle are 55° and 45°. Find the third angle. Explain in long. ​

Answer 1

Answer: 80 degrees

Step-by-step explanation: No matter what type of triangle it is, wether it be an equalateral triangle or an isosceles triangle, it must have all of its angles add up to 180 degrees, so if we have 2 of the angles, we must add the angles together and subtract them from 180 to get the final answer. So 55 + 45 = 100, 180 - 100 = 80, so the final angle is 80 degrees.

Hope this helps.

Answer 2

$\huge\tt\red{Answer}$

$\sf \: let \: the \: third \: angle \: be \: x \\ \\ \implies \sf \: 55 + 45 + x \: = \: 180 \\ \\ \implies \sf \: 100 + x \: = \: 180 \\ \\ \implies \sf\: x \: = \: 80$

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