Question

Please solve! It's really easy (I think).

Answer 1

• CD = 5.2 cm
• A = 27 cm²

Explanation:

As per diagram we have:

• m∠A = 30°
• m∠BCD = 30°

As per 30° right triangle property:

• CD = √3×CB/2 = 3√3 ≈ 5.2 cm
• and
• AC = 2CD = 2×5.2 = 10.4 cm

Area of triangle:

• A = 1/2bh
• A = 1/2CB*AC
• A = 1/2*5.2*10.4 ≈ 27 cm²