Posted by audrey on Tuesday, May 17, 2011 at 8:29pm.
since the sides of the two similar road signs are in the ratio of 2 : 1
so their areas are proportional to the square of their sides
2^2 : 1^2 = 4 : 1
so the second is 4 times larger.
You could do it the long way, and actually calculate their areas. You will find the the first answer is 4 times the second answer.
Triangle area:
A = bh/2
A = (16.5 * 8)/2
A = 132/2
A = 66 square feet
Find the area of the smaller triangle the same way.
thank you Reiny and Ms. Sue!! I wouldn't be able to make it through my math class without you!
You're welcome, Audrey.
Related Questions
math final studying - a triangular road sign has a height of 8 feet and a base ...
math - a triangular road sign has a height of 8 feet and a base of 16.5 feet. ...
algebra - A shopkeeper is making a triangular sign for his store front, but he ...
pre-algebra - Use an inequality to solve the problem. A shopkeeper is making a ...
geometry - The area of a triangular garden can be no more than 120 feet square ...
Geometry - A sandpit in the shape of a rectangular prism has length 7 feet, ...
geometry - A sandpit in the shape of a rectangular prism has length 7 feet, ...
math - A student notices that the shadows of a sign and a tree lie along the ...
MATH - The length of the house is 50 feet, the width is 30 feet, and from the ...
math - a tank is in the shape of a triangular prism. If the triangular base has ...
For Further Reading
