3 In AABC, B = 104.3°, C = 31.3°, a = 29-0cm. Calculate c.​

Question

3 In AABC, B = 104.3°, C = 31.3°, a = 29-0cm.
Calculate c.​

in progress 0
Thu Giang 3 years 2021-08-01T02:33:10+00:00 1 Answers 106 views 0

Answers ( )

  1. thuhuong
    0
    2021-08-01T02:34:59+00:00
    Reply

    Answer:

    21.53 m

    Step-by-step explanation:

    We can obtain the angle C;

    C + 104.3 + 31.3 = 180 ( sin of angles in a triangle)

    C = 180 – (104.3 + 31.3)

    C = 44.4°

    Using Sine rule :

    c / sinC = a / sin A

    Cross multiply :

    c * sin44.4 = 29 * sin 31.3

    c * sin44.4 = 15.066054

    c = 15.066054 / sin 44.4

    c = 15.066054 / 0.6996633

    c = 21.533291

    c = 21.53 m

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )