rheadas1246 rheadas1246

02-01-2021
Mathematics

contestada

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

Please solve Its really easy I think class=

Respuesta :

mhanifa mhanifa

02-01-2021

Answer:

CD = 5.2 cm
A = 27 cm²

Step-by-step 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

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