1.1.3 Measuring and Constructing Angles − Worksheet
Example 1: 1. Musicians use a metronome to keep time as they play. The metronome’s needle swings back and forth in a fixed amount of time. Name all of the angles in the diagram.
B
A
C
1 2
O
Example 2: Use the protractor to find the measure of each angle. Then classify each as acute, right, or obtuse. 2. ∠ VXW T
U
90
3. ∠ TXW
S
V
R
W
4. ∠ RXU
X
1
2
3
4
5
Example 3: L is in the interior of ∠ JKM. Find each of the following. 5. m ∠ JKM if m ∠ JKL = 42° and m ∠ LKM = 28°
6. m ∠ LKM if m ∠ JKL = 56.4° and m ∠ JKM = 82.5°
Example 4: BD bisects ∠ ABC . Find each of the following. 7. m ∠ ABD if m ∠ ABD = (6 x + 4)° and m ∠ DBC = (8 x − 4)°
8. m ∠ ABC if m ∠ ABD = (5 y − 3)° and m ∠ DBC = (3 y + 15)°
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