Construct angle 120 ∘ using protractor and write the type of angle.

Draw a ray OA → using a ruler. Place the center of the protractor at point O so that the baseline of the protractor is on the ray OA → . Now the ray is a straight line measuring 120 ∘ , mark a point at 120 ° and name it as B. Join point B with O. Hence, ∠ BOA = 120 ∘ is the required angle. Since the angle measures is more than 90 ° , Therefore angle is an obtuse angle.

Construct angle 160 ∘ using protractor and a ruler.

Draw a ray OA → using a ruler. Place the center of the protractor at point O so that the baseline of the protractor is on the ray OA → . Now the ray is a straight line measuring 160 ∘ , mark a point at 160 ° and name it as B. Join point B with O. Hence, ∠ BOA = 160 ∘ is the required angle. Since the angle measures is more than 90 ° , Therefore angle is an obtuse angle.

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Mental Maths 5>Chapter 10 - Triangles and Quadrilaterals>Exercise-5

Hemant Malhotra and R K Tyagi Solutions for Chapter: Triangles and Quadrilaterals, Exercise 5: Exercise-5

Author:Hemant Malhotra & R K Tyagi

Hemant Malhotra Mathematics Solutions for Exercise - Hemant Malhotra and R K Tyagi Solutions for Chapter: Triangles and Quadrilaterals, Exercise 5: Exercise-5

Attempt the free practice questions on Chapter 10: Triangles and Quadrilaterals, Exercise 5: Exercise-5 with hints and solutions to strengthen your understanding. Mental Maths 5 solutions are prepared by Experienced Embibe Experts.