Question

3. The measures of angles of a triangle are xº,
(x-20), (x-40). Find the measure of eachhfind the measurements of the 3 number
5. I
angle.​

Answer 1

Answer:

Measure of 1

st

angle =x

o

Measure of 2

o

angle =(x−20)

o

Measure of 3

rd

angle =(x−40)

o

By using angle sum property of triangle

x

o

+(x−20)

o

+(x−40)

o

=180

o

3x−60=180

3x=240

x80

o

∴ Measure of 1

st

angle =x

o

=80

o

Measure of 2

nd

angle =(x−20)

o

=60

o

Measure of 3

rd

angle =(x−40)

o

=40

o

Answer 2

Answer:

first angle be x°

second angle be (x-20)

third angle be (x-40)

using angle sum property

the sum of the all the angle of the triangle is equal to 180°

So

x+x-20+x-40=180°

3x-60=180°

3x=180+60

3x =240

x=80°

first angle be =80°

second angle be=80-20 = 60

third angle be =. 80-40 = 40