CPM Homework Help : INT2 Problem 3-72

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3-72.

Use what you know about the angles of a triangle to determine the value of $x$ and the angle(s) in each triangle below.

Hint:

Use the Triangle Angle Sum Theorem.

More Help:

Hint (a):
$x + 79^\circ + 90^\circ = 180^\circ$

Hint (b):
$x + x + 90^\circ = 180^\circ$

Answer (c):
$x = 30^\circ$

Answer (d):
$x = 68^\circ$

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