Answer/Step-by-step explanation:
Apply the formula for area of a triangle with an included angle and two given side lengths, A = ½*a*b*Sin(θ)
15. a = 3 cm,
b = 3 cm,
θ = 140°
A = ½*3*3*Sin(140)
A = 2.89 ≈ 2.9 cm² (nearest tenth)
16. a = 5 yd,
b = 8 yd,
θ = 98°
A = ½*5*8*Sin(98)
A = 19.81 ≈ 19.8 yd² (nearest tenth)
17. a = 5 cm,
b = 6 cm,
θ = 152°
A = ½*5*6*Sin(152)
A = 7.04 ≈ 7.0 cm² (nearest tenth)
17. a = 5 m,
b = 6 m,
θ = 150°
A = ½*5*6*Sin(150)
A = 7.5 ≈ 7.5 m² (nearest tenth)
