Terry is measuring LRST using pattern blocks. The smaller angle of each of the tan pattern blocks shown below measures 30°. What is the measure of LRST? Explain.
To find the measure of angle LRST, we need to consider that the three tan pattern blocks form a straight line, so their angles add up to 180°. Since each tan pattern block has a smaller angle of 30°, the total angle formed by the three blocks is 30° + 30° + 30° = 90°.
Therefore, the measure of angle LRST is 180° - 90° = 90°. Terry has measured angle LRST to be 90° using the pattern blocks.