Answer:
7
Step-by-step explanation:
(+8)-(-4)+(-5)
8+4-5
12-5
7
Answer:
i need help
Step-by-step explanation:
Answer:
If all four angles of a rectangle have the same measure, then it is a square.
Answer:
180.0
Step-by-step explanation:
Answer:
31°
Step-by-step explanation:
The theorem states that all angle sums of any triangle add up to 180°.
128 + 21 = 149, and to find ?°, subtract 149 from 180 to get 31°.