Write an equation in slope-intercept form of the line that has a slope of 4 and a y-intercept of 9.
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Answer:
AC = 5
Step-by-step explanation:
AC is the diagonal of the rectangle ABCD and splits the rectangle into 2 right triangles.
Using right triangle ABC with hypotenuse AC
Applying Pythagoras' theorem gives
AC² = AB² + BC² ← substitute given values
AC² = 4² + 3² = 16 + 9 = 25
Take the square root of both sides
AC = = 5