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help plz quick

 Aug 8, 2020
 #1
avatar+26635 
+1

Angle  A and  B are equal  =  75 degrees

 

6 sin 75 = height =  ~ 5.8          6 cos 75 = 1/2 of the base       base = 3.1

 

area = 1/2 base * height =  1/2   3.1  *  5.8 =  9 units2

 Aug 8, 2020
 #2
avatar+169 
+2

Since this is an isoceles, angle A and B = 75

Now we do sin and cos stuff here

6 sin 75 =~ 5.8

6 cos 75 = 3.1

and i think the area would be (3.1*5.8)/2 which is 8.99 ~ 9

not exactly 

but eh

 Aug 8, 2020
 #3
avatar+1332 
+2

6*cos75º = 1.55291427

 

1.55291427 * 5.7955495 = 9

Dragan  Aug 8, 2020
 #4
avatar+21953 
0

There is also an area formula for a triangle:  Area  =  ½·a·b·sin(C)

where a and b are two sides of the triangle and  is the included side.

 

For this problem:  Area  =  ½·6·6·sin(30o)  =  9

 Aug 8, 2020

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