Answer:
∠ 4 = 80°
Step-by-step explanation:
∠ 5 and 100° are vertical angles and are congruent , so
∠ 5 = 100°
∠ 4 and ∠ 5 are same- side interior angles and sum to 180° , that is
∠ 4 + ∠ 5 = 180°
∠ 4 + 100° = 180° ( subtract 100° from both sides )
∠ 4 = 80°
Answer:
Part A - D:8
Part B - C:140°
<h3>Solving/Reasoning:</h3>
Part A: Vertical angles are always congruent.
Part B: If angles are supplementary, they need to equal 180 when added together. Since we know angle A is 40, we can subtract it from 180 and figure out what is left over that should be angle B.
40+B=180
B=180-40
B=140
Answer:
Area : 114.25 in^2
Perimeter : 47.7 in
Step-by-step explanation:
In this problem when finding the perimeter you have a normal triangle and a semi-circle. so you add the 2 sides of the triangle and find the circumference of a semi-circle with a radius of 5.
17 + 15 + {(3.14)[2(5)]}/2 =
32 + {(3.14)[10]}/2 =
32 + 31.4/2 =
32 + 15.7 =
47.7
When finding the are you have to make the shapes as easy as possible. In this case you divide it to be triangle and semi-circle. Then add the 2 areas together.
[15(10)]/2 + {(3.14)[(5)^2]}/2
150/2 + {(3.14)[25]}/2
75 + 78.5/2
75 + 39.25
114.25
Answer:
What triangles?
Step-by-step explanation:
