# Geometry/Trig.

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For acute angle Aof a right triangle, find tan A by using the 45-45-90 Triangle Theorem or the 30-60-90 Triangle Theorem.

measure of angle A=45 degrees.

• Geometry/Trig. -

angle A = 45 deg

Special 45-45-90 deg triangles have sides in the
ratio of 1:1:(sqrt(2)) OR
ratio n : n : n(sqrt(2))

This means, in this problem,
side a = 1 (opposite side)
side b = 1 (adjacent side)
side c = 1*(sqrt(2)) (hypotenuse)

tan A = a/b = op/adj
tan 45 = ?

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