Blue + Green = Turquoise

Geometry Level 1

ABCD is a unit square, with E the midpoint of AB and F the midpoint of CD. Draw the isosceles triangles ABF and DEC, which intersect at points G and H. What is the area of the diamond-shaped quadrilateral EGFH?

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100 Day Summer Challenge

Blue + Green = Turquoise

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

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Master advanced concepts through explanations, examples, and problems from the community.

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Courses

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Community

100 Day Summer Challenge

Blue + Green = Turquoise

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations, examples, and problems from the community.

Used and loved by 4 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.

Master advanced concepts through explanations,
examples, and problems from the community.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Master advanced concepts through explanations,
examples, and problems from the community.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.