26.
CB=√AB²+AC²
=√9²+6²
=√81+36
=√117
=3√13
CA/CD=AB/DE
6/10=9/DE
DE=90/6
DE=15
(c. 15 cm)
27.
BD=√ADxCD
=√12x4
=√48
=4√3
BC=√DAxDC
=√(4√3) x 4
=√16√3
=4√3½
BD+BC=√48+√16√3
=4√3+4√√3
=
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26.
CB=√AB²+AC²
=√9²+6²
=√81+36
=√117
=3√13
CA/CD=AB/DE
6/10=9/DE
DE=90/6
DE=15
(c. 15 cm)
27.
BD=√ADxCD
=√12x4
=√48
=4√3
BC=√DAxDC
=√(4√3) x 4
=√16√3
=4√3½
BD+BC=√48+√16√3
=4√3+4√√3
=