The area of CEF will be calculated as follows:
The ratio of (BE+FD):EF is:
3:2
But the area of BDC=1/2ABCD
thus
BDC=1/2*100=50 in
hence the area of CEF will be:
(fraction of CEF)×(Area of BDC)
fraction of CEF=2/5
hence the area will be:
2/5×50
=20 in²
Answer:
43, 40
Step-by-step explanation:
1) Exterior angles are equal.
(x + 44) = 87 --> 87 - 44 = 43
x = 43
2) Alternate interior angles are equal.
(x - 30) = 70
x = 40
Answer:
4x^2+10x-2=0
Step-by-step explanation:
So the total area of mirror: 2*3 = 6 ft sq
8-6 = 2 ft sq is the area of the frame
x is the thickness of the frame
so we have (2*x)*2+(3*x)*2+x*x*4= 2
4x+6x+4x^2=2
-> 4x^2+10x-2=0
Exact form is 8/7 , as a decimal its 1.142 and mixed number form its 1 1/7
