Answer:
can you put an image so I can help you?
Step-by-step explanation:
The answer to this question, if I'm correct would be:
1/2k - 3/5
I hope I could help (:
Answer:
B
Step-by-step explanation:
Meet at the middle of the two lines
Since it is shown that 2 of the sides of the triangle are congruent, we can assume that they have the same angle measures.
so to solve for the missing angle you can set up an equation equal to 180 since all triangles add up to 180 degrees.
21 + 21 + x = 180
42 + x = 180
x = 138
the value of the missing angle should be 138 degrees
hope this helped
Answer:
D
Step-by-step explanation:
Using cosine formula, we have
