Question
In a cyclic quadrilateral ABCD, the diagonals AC and BD
intersect at E. If ∠AEC = 120° and ∠BED = 30°, what is the measure of ∠ADB?ÂSolution
Since ABCD is a cyclic quadrilateral, opposite angles sum up to 180°. Also, in cyclic quadrilaterals, ∠AEC + ∠ADB = 180° by the property of intersecting chords. Thus, ∠ADB = 180° - 120° = 60°. Correct answer: c) 60°
1240.04 – 360.18 + 449.98 ÷ 15.06 = ?
(√360.99 + 161.14) ÷ 5 × 249.98 = ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
837.04 × 4.02 + 40.04% of 3049.98 – 3667.82 = ? 2 – 60.87
What approximate value should come in the place of question mark in the following questions?
(98.6% of 405.4) − (29.8 × 9.7) = ?
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
(9/10 of 3999.79) - √2499.83 + (17.81% of 1199.81) = ?
(15.99)2 + 219.98% of 20.01 = ?2 × 75.01%
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
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