20 beacause 20 x 2 = 40 and twice as many means 2 x ....
Answer:
the first one
Step-by-step explanation:
To solve this problem you use the Triangle Angle Sum Theorem concept. Which means all 3 angles of a triangle add up to 180° degrees.
The formula for this concept is:
a+b+c=180°
The missing word is:
exponent
