The classification of the following triangles are below:
- Diagram 1: Scalene triangle. option B
- Diagram 2: Equilateral triangle. option A
- Diagram 3: Isosceles triangle. option B
- Diagram 4: Acute triangle. option A
- Diagram 5: The value of a in the convex polygon is 40°
- Diagram 6: The value of s from the measure is 27
- Diagram 7: The value of m < 1 is 56°
- Diagram 8: The value of m < 1 is 120°
The types of triangle
The types of triangle includes:
- Scalene: A triangle having each of its three sides of different lengths.
- Equilateral triangle: A triangle having all three sides equal.
- Isosceles triangle: A triangle having two sides equal.
- Obtuse triangle: A triangle in which one of whose angles is obtuse, that is, an angle greater than 90° but less than 180°
- Acute triangle: A triangle which all of the angles are acute, that is, all interior angles are less than 90°
- Right angle triangle: A triangle all of the angles of which are acute.
5. a = 180° - (56° + 84°)
= 180° - 140°
= 40°
6.
5s + (3s - 9) + 45 = 180
5s + 3s - 9 + 45 = 180
8s - 36 = 180
8s = 180 + 36
8s = 216
s = 216/8
s = 27
7. 180° - 139° = 41°
m < 1 = 180° - (41° + 83°)
= 180 - 124
m < 1 = 56°
180° - (68° + 52°)
= 180 - 120
= 60°
m < 1 = 180° - 60°
= 120°
Therefore, a triangle is a three sides polygon which also have three angles.
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