Answer:
BC ≈ 3.3
Step-by-step explanation:
Using the tangent ratio in the right triangle.
tan A = , that is
tan20° = = ( multiply both sides by 9 )
9 × tan20° = BC , then
BC ≈ 3.3 ( to the nearest tenth )
Answer: the shaded squares are equal to 0.3
B. if two lines are perpendicular, then they intersect to form four right angles.
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