Answer:
C. 139°
Step-by-step explanation:
Given:
m<A = 62°
m<B = 77°
Required:
Find m<1
Solution:
Since ∆ABC is similar to ∆DEF, therefore:
<A ≅ <D, which means m<D = 62°
<B ≅ <E, which means m<E = 77°
<C ≅ <F
Therefore, based on exterior angle theorem:
m<1 = m<D + m<E
m<1 = 62° + 77° (substitution)
m<1 = 139°
Peter, to find the perimeter you have to add all sides up.
Answer:
u = -3
Step-by-step explanation:
Step 1: Write equation
-4 + 2u = -10
Step 2: Solve for <em>u</em>
<u>Add 4 to both sides:</u> 2u = -6
<u>Divide both sides by 2:</u> u = -3
Step 3: Check
<em>Plug in x to verify if it's a solution.</em>
-4 + 2(-3) = -10
-4 - 6 = -10
-10 = -10
