When using the given diagram to determine the area of the gray polygon by decomposition, which statements are correct?:
2 answers:
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Answer:
∠ GDH = 67.5°
Step-by-step explanation:
The measure of the chord- chord angle GDH is half the sum of the measures of the arcs intercepted by the angle and its vertical angle.
∠ GDH = (GH + EF) =
(90 + 45)° = 0.5 × 135° = 67.5°
Surface area of square pyramid having square base side = 10 cm and slant height = 20 cm is 340 square meters
<u>Solution:</u>
Given that
Shape of the roof is square pyramid.
Base length of square pyramid roof = 10 meters
Slant height of square pyramid roof = 12 meters
Need to calculate the surface area of the roof
Where s is side of square base and l is slant height.
In our case s = 10 meters and l = 12 meters
On substituting the given values in formula we get
Surface area of square pyramid
Hence surface area of square pyramid having square base side = 10 cm and slant height = 20 cm is 340 square meters.