The pennant below is in the shape of an isosceles triangle. The equal sides each measure 20 inches, the altitude measures x + 10 inches and the base measurews 4x inches. What is the length of the base?

Elementary Algebra
17th Edition
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
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Chapter3: Math Models
Section3.4: Solve Geometry Applications: Triangles, Rectangles, And The Pythagorean Theorem
Problem 3.71TI: The area of a triangular painting is 126 square inches. The base is 18 inches. What is the height?
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The pennant below is in the shape of an isosceles triangle. The equal sides each measure 20 inches, the altitude measures x + 10 inches and the base measurews 4x inches. What is the length of the base?

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