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प्रश्न
Using the given information, write the type of triangle in the table given below
| S.No | ∠1 | ∠2 | ∠3 | Type of triangle based on angles | Type of triangle based on sides |
| i. | 60° | 40° | 80° | Acute angled triangle. | Scalene Triangle |
| ii. | 50° | 50° | 80° | ||
| iii. | 45° | 45° | 90° | ||
| iv. | 55° | 45° | 80° | ||
| v. | 75° | 35° | 70° | ||
| vi. | 60° | 30° | 90° | ||
| vii. | 25° | 64° | 91° | ||
| viii. | 120° | 30° | 30° |
उत्तर
| S.No | ∠1 | ∠2 | ∠3 | Type of triangle based on angles | Type of triangle based on sides |
| i. | 60° | 40° | 80° | Acute angled triangle. | Scalene Triangle |
| ii. | 50° | 50° | 80° | Acute angled triangle | Isosceles triangle |
| iii. | 45° | 45° | 90° | Right−angled triangle | Isosceles triangle |
| iv. | 55° | 45° | 80° | Acute angled triangle | Scalene triangle |
| v. | 75° | 35° | 70° | Acute angled triangle | Scalene triangle |
| vi. | 60° | 30° | 90° | Right−angled triangle | Scalene triangle |
| vii. | 25° | 64° | 91° | Obtuse angled triangle | Scalene triangle |
| viii. | 120° | 30° | 30° | Obtuse angled triangle | Isosceles triangle |
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(a) equilateral triangle
(b) isosceles triangles
(c) scalene triangles
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(f) right triangles
Two sides of the triangle are given in the table. Find the third side of the triangle.
| SI. No. | Side - 1 | Side - 2 | The length of the third side (any three measures) |
| i. | 7 cm | 4 cm | |
| ii. | 8 cm | 8 cm | |
| iii. | 7.5 cm | 3.5 cm | |
| iv. | 10 cm | 14 cm |
Complete the following table:
| Types of Triangle/Its Angles | Acute angled triangle | Right angled triangle | Obtuse angled triangle |
| Any two angles | Always acute angles | i. | Always acute angles |
| Third angle | ii. | Right angle | iii. |
