Question

One angle in a triangle has a measure that is three times as large as the smallest angle. The measure of the third angle is 20 degrees more than that of the smallest angle. Find the measure of the LARGEST angle.

The LARGEST angle has a measure of ____ degrees.

Answer 1

LARGEST ANGLE= 96 DEGREES

Explanation:

MEASURE OF LARGEST ANGLE= 3A

SMALLEST ANGLE= A

THIRD ANGLE= 20+A

3A+A+20+A=180(SUM OF INTERIOR ANGLES OF TRAINGLE IS 180 DEGREES)

TRANSPOSE 20 TO RHS.

5A=180-20=160

A=160/5

=32

MEASURE OF SMALLEST ANGLE=32

LARGEST ANGLE=3A=3*32=96 DEGREES

THIRD ANGLE=32+20=52 DEGREES

Answer 2

The largest angle has a measure of 96 degrees.

Explanation:

In order to solve this problem, we have to know the fact that the sumatory of the internal angles of any triangle is 180 degrees.

With this statement in mind, and looking at the image, we can say:

180 = A + B + C (eq. 1)

Before continue any further, let's affirmt that B is the smallest angle.

Now the enunciate says "One angle in a triangle has a measure that is three times as large as the smallest angle"; This can be express as:

A = 3B (eq. 2)

The other enunciate is "The measure of the third angle is 20 degrees more than that of the smallest angle" This can be express as:

C = B + 20 (eq. 3)

Now, replacing equations 2 and 3 into 1:

(eq. 1) 180 = 3B + B + B + 20

And clearing B:

B = 32.

By knowing B, we can clear A and C from equations 2 and 3 respectively:

(eq. 2) A = 3B, so A= 96

(eq. 3) C = B + 20, so C =52