Find Angle α in a Triangle with Given 50° Angle

Find the measure of the angle α \alpha

505050AAABBBCCC50

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Step-by-step video solution

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00:00 Determine the value of A
00:03 The sum of angles in a triangle equals 180
00:07 Substitute in the relevant values according to the given data and proceed to solve for A
00:10 Group terms
00:15 Isolate A
00:18 This is the solution

Step-by-step written solution

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1

Understand the problem

Find the measure of the angle α \alpha

505050AAABBBCCC50

2

Step-by-step solution

Recall that the sum of angles in a triangle equals 180 degrees.

Therefore, we will use the following formula:

A+B+C=180 A+B+C=180

Now let's insert the known data:

α+50+50=180 \alpha+50+50=180

α+100=180 \alpha+100=180

We will simplify the expression and keep the appropriate sign:

α=180100 \alpha=180-100

α=80 \alpha=80

3

Final Answer

80

Practice Quiz

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Is the straight line in the figure the height of the triangle?

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