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In right triangle ABC, m angle A=2x+20, m angle B=7x+7, and m angle C=90 find the value of x

Sagot :

Ok, so

Let me draw the situation here below:

So, we want to find the value of x.

For this, we have to remember that the sum of the internal angles of any triangle will always be 180°.

And we got the following angles:

A = 2x+20

B = 7x+7

C = 90

And we know that:

2x + 20 + 7x + 7 + 90 = 180°

9x + 117 = 180

We let numbers in one side of the equation and "x terms" in the other side. Like this:

9x = 63

Therefore, the value of x is 7.

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