Question

Find the area of ABC if angle A = 60 degree and angle B = 30 degree and AC = 4

Answer 1

In the triangle

sum of all angles =180 Degree

Here,

A=60degree

B=30degree

C=? let's take the C is X

60+30+X=180

90+X=180

X=180-90

X=90

then C value is 90 degrees

Answer 2

Answer:

by the angles given we can easily calculate angle c

which will be equal to 90

Step-by-step explanation:

so we now know that it is a right angled triangle

we know the pythagorean triplet is 3,4 and 5

so the area of the triangle is half×base×height

1/2×3×4

=6 is the area

there is a formula to find the side of a right angled triangle when one side is given.

that is the relation between all the sides will be

2n,n^2-1,n^2+1

here we can take 2n=4

so n= 2

now 2^2-1=3

and 2^2+1=5

that is how we got the sides

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