Question

Can someone help me with this one and write the step by step explanation please.

Calculate the length of side A (watch the piccture of the triangle)

Thanks in advance!!

Answer 1

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➷ As the two lengths are a, this means it is an isosceles triangle.

The two unknown angles would be equal so we can calculate them:

(angles in a triangle equal 180 degrees)

(180 - 90) / 2 = 45

Now we can use the sine rule to calculate the length a

(6 / sin(90)) x sin(45) = a

a = 4.242640687

To one decimal place, your answer would be:

a = 4.2mm

✽

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

Answer 2

(angles in a triangle add to 180 degrees)

(180 - 90) / 2 = 45

Use the sine rule to calculate the length a

(6 / sin(90)) x sin(45) = a

a = 4.242640687

a = 4.2 mm (This answer is to 1 decimal place)