Question
Find the area of triangle formed by the points A(1, 2),
B(4, 6), and C(5, 2).Solution
Area = (1/2) | x1(y2 - y3) + x2(y3 - y1) + x3(y1 - y2) | = (1/2) | 1(6 - 2) + 4(2 - 2) + 5(2 - 6) | = (1/2) | 1(4) + 0 + 5(-4) | = (1/2) | 4 - 20 | = (1/2) × 16 = 8 sq. units.
15.99% of 549.99 ÷ 11.17 = ? ÷ 20.15
74.91% of 639.95 – 599.98% of 45 + 119.987 = ?
(4.88 × 5.76)2 - ?2 = 39.89 × 19.86
- 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.)
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exactvalue.)
(1800.23 ÷ 29.98) + (816.32 ÷ 23.9) + 1634.11 = ?
1449.98 ÷ 50.48 × 10.12 = ? × 2.16
36.05 × 5.02 + 12.052 = ? + 9.09 × 4.04Â
(31.9)3 + (34.021)² - (16.11)3 - (42.98)² = ?