Question

AD = 100cm, A = 45,B=65. Find AB and area of triangle ABC​

Answer 1

In triangle ACD,

$tan \: \: a \: = \frac{pependicular}{base} \\ tan \: 45 \: \: = \frac{cd}{ad} \\ 1 = \frac{cd}{100} \\ cd \: = 100$

Area of triangle ABC = 1/2 × Base × Height

= 1/2 × 100 × 100

= 50 × 100

= 5000 cm²

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