alleryStart learning →Four angles meet at a point. Two measure 90° and 110°, and the other two are equal. What is each of the equal angles?
A80°
B70°
C90°
D100°
Answer & Solution
Correct answer: A. 80°
Angles around a point add up to 360°, so the two equal angles share 360° minus 200°, which is 160°, giving 80° each.
Keep practising Lines and Angles
Browse all Lines and Angles questions for Olympiad (Class 7), or explore more Mathematics topics.
Related questions
A line cuts across two other lines at two different points. What is this line called?Two angles share a vertex and an arm, with no common interior. They are called?How many pairs of corresponding angles does a transversal make with two lines?Two parallel lines are cut by a transversal and a pair of consecutive interior angles are For any angle smaller than 90°, how much larger is its supplement than its complement?A triangle's exterior angle is 120° and the opposite interior angles are in the ratio 1 : A ray stands on a straight line making angles (x + 20)° and (2x - 5)°. What is the larger Lines AB and CD cross at O. Angle AOC is (2x + 10)° and angle BOD is (3x - 20)°. What is a