Find the unknown angles of a quadrilateral.

Problem 1 :

Solution

Problem 2 :

Problem 3 :

Problem 4 :

Problem 5 :

Problem 6 :

One angle of a quadrilateral is 150°and other three angles are equal. What is the measure of each of these equal angles ?

(a) 75° (b) 85° (c) 95° (d) 70°

Problem 7 :

Four angles of quadrilateral are in the ratio 3:4:5:6. Find its angles.                    Solution

Problem 8 :

Three angles of a quadrilateral are 4 : 6 : 3. If the fourth angle is 100, find the three angles of a quadrilateral.

Problem 9 :

The sum of two angles of a quadrilateral is 160 the ratio 2 : 3. Find the angles.

Problem 10 :

What is the maximum number of obtuse angles that a quadrilateral can have ?

(a) 1    (b) 2     (c) 3     (d) 4

 1)  x° = 87°2)  x° = 43°3)  x° = 36.5°4)  x° = 90°5)  x° = 60° 6)  x = 707)  x = 208)  60, 80 and 120.9)  80 and 12010)  3

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