What is the definition of point of tangency? in Geometry
2 answers:
A tangent is basically a line that 'just touches' a curve - i.e. it is in a place where it approaches the curve, and a single point on the line touches a single point on the curve. It's quite an awkward definition since 'just touches' means only one infinitely small part of the line touches the curve, but it's quite obvious when you see it.
For that reason, I have attached a little diagram I improvised just now to help explain it. The red dot is where they meet, and the straight line is tangential to the circle.
For that reason, I have attached a little diagram I improvised just now to help explain it. The red dot is where they meet, and the straight line is tangential to the circle.
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Answer:
The answer is below
Step-by-step explanation:
From the image attached, the measurement of the roof is 5 m by 9 m on both sides. Hence:
Area of roof = 2 (5 * 9) = 90 m²
Since solar panels cost $4.00 per square meter, therefore:
Cost of solar panels = $4.00 per square meter * 90 m² = $360
The area of the front wall of the barn = (8 m * 7 m) + (1/2 * 8 m * 3 m) - (4 m * 4 m) = 52 m²
The area of the back wall of the barn = (8 m * 7 m) + (1/2 * 8 m * 3 m) = 68 m²
Area of each side wall of barn = 9 m * 7 m = 63 m²
Total area of wall = 52 m² + 68 m² + (2 * 63 m²) = 246 m²
Cost of shingles = $2.50 for each square meter * 246 m² = $615
Total cost of project = $615 + $360 = $975
