caitlincapehorn caitlincapehorn

20-06-2021
Mathematics

contestada

POR is a right-angled triangle.
13 cm
5 cm
12 cm
Work out the size of angle POR.
Give your answer correct to 1 decimal place.
+ +
1
Total marks: 3

Respuesta :

21-06-2021

Answer:

As 3-4-5 5-12-13 is a right triangle

5^2 + 12^2 = 25 * 144 = 169 = 13^2

Not sure how POR is designated, but

cos theta = 12/13 = .923 theta = 22.6 deg

sin theta = 5/13 = .385 theta = 22.6 deg

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