Area of incircle of a ∆ = πr 2 =π(a/(2√3)) 2 = π((10.5)/(2√3)) 2 =π × (10.5/2√3)2 =(22/7) × 110.25/12 = 28.75 cm2
152 142 122 ? 52 2
7, 6, 10, 27, 104, ?
96, 457, 168, 393, ?, 345
9 19 39 ? 159 319
1, 7, 37, 187, 937, ?
42, 48, 60, 84, 132, ?
78, 80, 84, ?, 108, 140
4 9 28 99 ? 2105 12660
8 12 39 ? 180 216
14 6 4 4 ? 48
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