1. The measure of angle A is 49° ( option C)
2. The value of x 7 ( option D)
3. 178° is an obtuse angle . (option C)
4. The angle is an obtuse angle
5. The triangle is an obtuse isosceles triangle ( option B)
6. The triangle is obtuse scalene triangle ( option A)
A triangle is a three sided polygon. There are different types of triangle, like scalene, acute, isosceles, obtuse e.t.c
The sum of angle in a triangle is 180°.
1. 4x + 1 + 3x + 11 + 84 = 180
7x + 96 = 180
7x = 180 - 96
7x = 84
x = 84/7
x = 12
angleA = 4x + 1 = 4(12) + 1
= 49°
2. 80 + 45 + 7x + 6 = 180
131 + 7x = 180
7x = 180 - 131
7x = 49
x = 7
3. 178° is an obtuse angle .
4. The angle is an obtuse angle.
5. The triangle is an obtuse isosceles triangle.
6. The triangle is obtuse scalene triangle.