# Chapter 13, Trigonometric Ratios and Functions - Chapter Test - Page 901: 25

$\approx42.48$

#### Work Step by Step

The area of a triangle can be calculated by multiplying two sides' length and the sine of their included angle by $0.5$. Hence here the area is: $0.5\cdot7\cdot13\cdot\sin(111^\circ)\approx42.48$

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