A) –9 + 3 = ?b) -7 + ? = -9
2 answers:
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First, lets assign label to the interior angles of the triangle.
Since angle 130° and angle A are on the same straight line, they are supplementary angles; therefore:
Next, angle B and angle 134° are also on the same straight line, so they are supplementary as well, which means:
Now, to find angle C remember that the sum of the interior angles of a triangle is 180°; therefore:
Finally, we also know that angle
and angle C are on the same line, so they are supplementary angles just like before; therefore:
We can conclude that the measure of our angle is 96°.
Since angle 130° and angle A are on the same straight line, they are supplementary angles; therefore:
Next, angle B and angle 134° are also on the same straight line, so they are supplementary as well, which means:
Now, to find angle C remember that the sum of the interior angles of a triangle is 180°; therefore:
Finally, we also know that angle
We can conclude that the measure of our angle