Explicación paso a paso:
1.
L×r/2
17×6/2 = 51m²
2.
(8 + 6)/2 × 4
28 m²
3.
40g = 40(9/10) = 36° = π/5
θr²/2
π/5(10)²/2
100π/10 = 10πm²
4.
(7+19)/2 × X = 39
26/2×X = 39
13×X = 39
X = 3m
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Explicación paso a paso:
1.
L×r/2
17×6/2 = 51m²
2.
(8 + 6)/2 × 4
28 m²
3.
40g = 40(9/10) = 36° = π/5
θr²/2
π/5(10)²/2
100π/10 = 10πm²
4.
(7+19)/2 × X = 39
26/2×X = 39
13×X = 39
X = 3m