True or false: (5.1 × 10^8)(2.1 × 10^8)=1.71×10^17
A
true
B
false

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

just keep asking questions until you have a better understanding.

step-by-step explanation:

step-by-step explanation:

for volume, add base x height x width