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2 years ago

1. Determine the measure of the unknown angles indicated by letters. Justify your answers with

Mathematics

1 answer:

Maurinko [17]2 years ago

7 0

Answer:

hello,

Step-by-step explanation:

In an isocele triangle, base's angles have the measure:

42+2a=180

2a=180-42

a=69(°)

in a triangle, an external angle has for measure the sum of the angles not adjacents.

55+b=132

b=77 (°)

in a quadrilater the sum of the (interior) angles is 2*180=360 degrees.

90+90+68+c=360

c=360-90-90-68

c=112 (°)

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goldenfox [79]

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Step-by-step explanation:

For any angle x (other than right angle) in a right triangle ,the trigonometric ratio of sin x is given by :-

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Given: A right triangle with hypotenuse = 68 units

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Let h be the side opposite to S, then using Pythagoras in the given right triangle, we get

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Now, the trigonometric ratio for sin S is given by :-

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