Question

DATE
4. find
BC (i) AD (ii) AC
thom
30
C
B​

Answer 1

Answer:

BC = 12√3

AD = 6

AC = 24

Step-by-step explanation:

In ∆ABC,

according to 30°-60°-90° theorem,

:.AB = ½AC

:.12 = ½AC

:.12 * 2 = AC

:.24 = AC

:.BC = √3/2*AC

:.BC = √3/2*24

:.BC = √3 * 12

:.BC = 12√3

In ∆ ADB,

according to 30°-60°-90° theorem,

:.AD = ½AB

:.AD = ½12

:.AD = 6

Ans.: (1)AC =24 cm.

(2)BC = 12√3 cm.

(3)AD = 6 cm.