Answer:
69.5 if C and D both add up to 90, M=90 if both angles C and D were complementary to combine to a supplementary.
Step-by-step explanation:
You're trying to find m which is a variable for measurement for the "D" angle.
Info Given:
20.5 for angle C
Unknown for angle D
Both angles are Complementary.
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I have 2 answers for this (The question was stated unclearly so I have 2 interpretations of this)
1st Answer:
If you're asking to solve for M but the C and D angles add up to 90 then do
90 - 20.5 = 69.5
2nd Answer:
We know that both angles are complementary which are 90-degree angles.
If we combine them then the angles add up to 180.
So C and D add up to form a Supplementary Angle.
20.5+69.5 + m = 180
Then M could possibly be 90.
Answer:
A prism whose cross-section is a 60-sided polygon has 120 vertices.
Step-by-step explanation:
A polygon has the same quantity of sides and vertices, as a prism has two poligonal faces, the number of vertices is double the quantity of vertices of the 60-sided polygon. That is:
A prism whose cross-section is a 60-sided polygon has 120 vertices.
Answer:
B
Step-by-step explanation:
it's basically 2+7
105 ÷ (−15) = -7
15 goes into 105 seven times and then you carry the minus over.
3(2x+7) Given
6x+21 Distribute
Distribute by multiplying 3 and 2x getting 6x and multiplying 3 and 7 getting 21.
