If (a=10 mathrm{ft}), find (b). Refer to the (45^{circ}-45^{circ}-90^{circ}) triangle shown in the following exercise. 45 b

If \(a=10 \mathrm{ft}\), find \(b\).

Refer to the \(45^{\circ}-45^{\circ}-90^{\circ}\) triangle shown in the following exercise.

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45 b 45%