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Answer:
2√5 cm.
Step-by-step explanation:
In triangles ABC and BDC
Angle B = angle D (90 degree)
Angle C = angle C (common)
By AA similarity
Triangle ABC ~ Triangle BDC
AB/BD = BC/DC = AC/BC
AD + DC = AC
8+2=10=AC
CD × AC = BC^2
2×10 = 20 = BC^2
BC= √20= 2√5 cm.
HOPE IT HELPS....
MARK AS THE BRAINLIEST.
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