1) Acute angled triangle![]() |
All the angles in a acute angled triangle are <90°. |
2) Right angled triangle![]() |
One of the angles in a right angled triangle is 90° |
3) Obtuse angled triangle![]() |
One of the angles in an obtuse angled triangle is >90° |
Answer: |
Sum of all the angles in a triangle is 180°. 59° + 85° + x = 180° 144° + x = 180° x = 36° |
Answer: |
3x + 4x – 8 + 3x – 2 = 180 10x – 10 = 180 10x = 190 x = 19° |
Second angle |
= 4x – 8
= 4(19) – 8
= 76 – 8
= 68°
|
Third angle |
= 3x – 2
= 3(19) – 2
= 57 – 2
= 55°
|