If degree measures of the angles of △ABC are represented by 2x, x+10, and 2x−30, then ΔABC must be —

A.obtuse.
b.right.
c.isosceles
d.scalene.

SAME, WHO HAS THIS QUESTION ON THEIR TEST...

Hurry we need the answer or we’re gonna fail

i think a

What’s the anwser!

obtuse

To determine the type of triangle △ABC, we need to analyze the degree measures of its angles.

Given that the degree measures of the angles of △ABC are represented by 2x, x+10, and 2x−30, we can set up an equation to find the value of x.

Since the sum of the degrees in a triangle is always 180°, we can write the equation:

2x + (x+10) + (2x−30) = 180

Simplifying the equation, we get:

5x - 20 = 180

Adding 20 to both sides:

5x = 200

Dividing by 5:

x = 40

Now that we know the value of x, we can substitute it back into the three angle expressions to find their respective measures:

Angle A: 2x = 2(40) = 80°
Angle B: x+10 = 40+10 = 50°
Angle C: 2x−30 = 2(40)−30 = 50°

Looking at the angle measures, we can conclude:

Angle A = 80°
Angle B = 50°
Angle C = 50°

Since none of the angles are 90° (right angle), the triangle △ABC is not a right triangle.

Since angle A is greater than 90° (obtuse angle), the triangle △ABC is not obtuse.

Since two angles (B and C) have the same measure, the triangle △ABC is isosceles.

Therefore, the answer is (c) isosceles.

Please what’s the answer!!!!

D c b

2x+x+10+2x-30 = 180

x = 40
so find the angle measures and see which type fits.