3,000,000 + 20,000 + 9,000 + 200 + 50 + 1
Answer:
The surface area of the pyramid in exact form is 64 +
cm²
The approximated surface area of the pyramid is 174.9 cm²
Step-by-step explanation:
The surface area of the square pyramid is the sum of the area of the base and the area of the four triangular faces
In Δ EFD
∵ m∠EFD = 90°
∵ m∠FDE = 60°
∵ ED = 8 cm
- By using sine ratio to find FE
∵ sin(∠FDE) = 
∴ sin(60) = 
- Multiply both sides by 8
∴ FE = 8 sin(60°)
∴ FE =
cm
In Δ AED
∵ AE = ED
∵ m∠D = 60°
- In any isosceles Δ if measure of an angle is 60, then the
triangle is equilateral Δ
∴ Δ AED is an equilateral Δ
∴ AD = 8 cm
∵ The pyramid has 4 identical triangular faces
∵ Area of each Δ =
× base × height
∵ AD is the base and FE is the height
∴ Area of each Δ =
× 8 × 
∴ Area of each Δ =
cm²
∵ Surface area of the pyramid = Area of base + 4 area of a Δ
∵ Area of base = 8²
∴ Area of base = 64 cm²
∴ Surface area of the pyramid = 64 + 4 × 
∴ Surface area of the pyramid = 64 + 
The surface area of the pyramid in exact form is 64 +
cm²
The approximated surface area of the pyramid is 174.9 cm²
Answer:
.375 cents Or 3.75 dollars
Step-by-step explanation:
So on each number you have a certain amount of quarters so for maggie 75 cents
and for elizabeth 1.25
and john 1.75 then add all together to get 375 cent of 3.75 dollars
Answer:
Here you go!
Step-by-step explanation:
Hope this helped!
Answer:
60
Step-by-step explanation:
We are given the triangles are congruent, that means the angles are the same measurement
<A = <X
<B = <Y
<C = <Z
We know A = 50 so X = 50
We know <Y = 70 so < B = 70
The three angles of a triangle add to 180
<A + <B + <C = 180
Substituting into the equation
50 + 70 + <C = 180
Combining like terms
120 + <C =180
Subtracting 120 from each side
120-120 +<C =180-120
<C = 60