Step-by-step explanation:
Pythagorus theorum:
17² = 15² + x²
289 - 225 = x²
√64 = x
∴ x= 8
Answer:
all quadrilaterals have at least one pair of parallel sides
Step-by-step explanation:
this this is true because all quadrilaterals starting from triangle has at least one pair of parallel sides
54/4 = 13.5
take the 2 whole numbers below 13.5 and the 2 whole numbers above 13.5
12 + 13 + 14 + 15 = 54