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Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 21)

In a right-angled triangle, what is the relationship between the two acute angles?
They are equal
They are supplementary
They are complementary
Their sum is 180 degrees

توضيح

Acute angles in a right-angled triangle are complementary (sum to 90 degrees).

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