willowmeyer12 willowmeyer12
  • 20-04-2020
  • Mathematics
contestada

Please help! I will mark you as brainliest!

Please help I will mark you as brainliest class=

Respuesta :

PollyP52 PollyP52
  • 20-04-2020

Answer:

19.8 cm to 3 significant figures.

Step-by-step explanation:

M <B  : m < A = 3 : 2.

Also m < A + m < B = 90 degrees

So m < B = 3/5 * 90 = 270/5

= 54 degrees and m < A = 90 - 54 = 36 degrees.

Cos A = 16 / AB

cos 36 = 16 / AB

AB cos 36 = 16

AB = 16 / cos 36

= 19.78 cm.

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