Answer:
X=-8
Y=10
Step-by-step explanation:
The picture in the attached figure
let
x--------> perimeter of triangle CED
y--------> perimeter of triangle BEA
we know that
∠A=∠D
∠B=∠C
∠E is equal in both triangles by vertical angle
so
triangle CED and triangle BEA are similar
x+y=110------> x=110-y------> equation 1
x/y=3/2----> 2x=3y-----> equation 2
substitute equation 1 in equation 2
2*[110-y]=3y-----> 220-2y=3y----> 3y+2y=220---> 5y=220----> y=44 units
x=110-y-----> x=110-44-----> x=66 units
the answer isperimeter of triangle CED is 66 unitsperimeter of triangle BEA is 44 units
Answer:
Step-by-step explanation: You can distribute the a first and then subtract what's inside, or you can calculate the inside first and then multiply by a
A) 288 m2
Explanation:
Ok so surface area is just adding up all the area of each faces. Just look at what I do below:
Area of the rectangular base:
10 • 6= 60
Area of the front triangle facing us:
1/2 • 12 • 10= 60
Multiply 60 by 2 cause there is still another similar triangle at the back- 60 • 2= 120
Area of the triangle facing right:
1/2 • 8 • 6= 24
Multiply 25 by 2 case there is still another similar triangle facing on other side(left)
24 • 2= 48
Add them all up together
60 + 120 + 48= 228
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