I did the first one I need help on this that’s all
2 answers:
The three angles of a triangle sum to 180 degrees.
Angle A + Angle B + Angle C = 180
(5x-25) + (2x+10) + (3x+5) = 180
Combine like terms:
10x -10 = 180
Add 10 to both sides:
10x = 190
Divide both sides by 10:
X = 190/10
X = 19
Now you have a value for x, find the angles:
Angle A = 5x-25 = 5(19)-25 = 95-25 = 70
Angle B = 2x +10 = 2(19) + 10 = 38 +10 = 48
Angle C = 3x +5 = 3(19) +5 = 57 + 5 = 62
70 + 48 + 62 = 180
Answer:
m<A = 70 deg
Step-by-step explanation:
The sum of the measures of the angles of a triangle is 180 deg. Add the three measures and set equal to 180. Solve for x. then use the value of x and the expression for m<A to find the measure of angle A.
m<A + m<B + m<C = 180
5x - 25 + 2x + 10 + 3x + 5 = 180
10x - 10 = 180
10x = 190
x = 19
m<A = 5x - 25 = 5(19) - 25 = 95 - 25 = 70
Answer: m<A = 70 deg
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