which one? please help. Triangle ABC has the angle measures shown below.

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UserX UserX · Answer 1 · 2019-07-02T07:08:14+02:00

measure of angle A is 20

step by step explaination:

sum of all three angles of a triangle = 180°

therefore angle s( A+B+C)= 180°

substitute the values of a, b and c angles

2x+5x+11x = 180

18x = 180

x= 180/18= 10 °

now check each given answers by putting the value of x, you will find only measure of 2x = 2x10= 20

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shubhamchouhanvrVT shubhamchouhanvrVT · Answer 2 · 2022-06-03T14:59:08+02:00

The measurement of angle A will be equal to 20.

The angle is defined as the span between two intersecting lines or surfaces at or close to the point where they meet.

The sum of all three angles of a triangle = 180°

Therefore angle s( A+B+C)= 180°

substitute the values of a, b and c angles

2x + 5x + 11x = 180

18x = 180

x = 180 / 18 = 10 °

Now check each given answer by putting the value of x, you will find an only a measure of

2x = 2 x 10 = 20

Therefore the measurement of angle A will be equal to 20.

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