Maths · Trigonometrical identities and trigonometrical functions
The measures of the angles of a triangle are in the ratio The triangle is:
The measures of the angles of a triangle are in the ratio \( 4: 5: 9 . \) The triangle is:
- A. An acute angled triangle
- B. A right angled triangle
- C. An obtuse angled triangle
- D. None of the above
Step-by-step solution
The angles are in ratio 4:5:9. Let the angles be 4x, 5x, 9x. Sum of angles = 18x = 180°, so x = 10°. The angles are 40°, 50°, and 90°. Since one angle is 90°, the triangle is right-angled.
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