ABCD is a cyclic quadrilateral, such that ratio of measures ∠A, ∠B and ∠C is 1 : 4 : 5, then the measure of ∠D is.
The sum of the opposite angles in cyclic quadrilateral is 180° ∠A = 1x ∠B = 4x ∠C = 5x ∠A + ∠C = 180° 1x + 5x = 180° x = 30° ∠B = 4 × 30° = 120° ∠B + ∠D = 180° 120° + ∠D = 180° ∠D = 60°
(7008.79)2/7009.201 × √1442.76 × 0.4897 =?
18.22 × 7.99 + 156.15 = ?
447.79 ÷ √(√2400) + 30.94 × 6.07 – 5.08 × 21.96 = ?
20% of 80 × 26% of 65 = ?
? = 23.08 + 19.99 × 28.07
`sqrt(7.987 X 24.790 +199.991)`
583.9 + 1519.98 - 445.21 = 1150.011 + ?
23.95% of 274.99 - 34.99% of 120.01 = 19.95% of ?
(98.999)2 - (9.9)2 - (14.9)2 = ?
(?)2 + 8.113 = 28.92 – 73.03
