The measures of the angles of △ABC are given by the expressions in the table. Angle Measure A 48° B (6x−28)° C (2x)° Find the value of x. Then find the measures of angles B and C. Enter your answers in the boxes. x = m∠B= 48 º m∠C= 12 º
A 48°
B (6x−28)°
C (2x)°
48 + 6x -28 + 2x = 180 degrees
8x = 160 degrees
x = 20
angle B = 6x - 28 = 92
angle C = 2x = 40
Double-Check
Angle A + B + C = 48 + 92 + 40
Angle A + B + C = 180 degrees
Answer:
Part 1) the value of x is \(20\°\)
Part 2) \(m
Part 3) \(m
Step-by-step explanation:
Part 1)
Find the value of x
we know that
The sum of the internal angles of a triangle must be equal to \(180\°\)
so
In this problem
substitute the values
\(48\°+(6x-28)\°+(2x)\°=180\°\)
solve for x
\(8x+20\°=180\°\)
\(8x=180\°-20\°\)
\(x=160\°/8=20\°\)
Part 2) Find the measure of angle B
\(m
substitute the value of x
\(m
Part 3) Find the measure of angle C
\(m
substitute the value of x
\(m