Use the formula sin A/ side a = sin B/side b. sin 12/8=sin B/10. Now cross-multiply, and with your calculator in degree mode, 10 sin 12 = 8 sin B. The left side comes out to 2.079, so you need to divide both sides by 8 to get sin B alone. Now the equation is .2599=sin B. Use the inverse function on your calculator sin^-1(.2599)=15.06
Answer:
10 units
Step-by-step explanation:
Area of smaller ∆ ,
= 1/2 * 2 * 2 = 2 u
Area of larger ∆ ,
= 1/2 * 4 * 4 = 8u
Total area = 8u + 2u = 10 units
