Construct triangle ABC using the information below. \( \mathrm{AB}=7.2 \mathrm{~cm} \) \( \mathrm{AC}=3.5 \mathrm{~cm} \) Angle \( \mathrm{BAC}=28^{\circ} \) Measure angle ACB to the neares degree.

Construct triangle \( P Q R \) such that \( P Q=8.5 \mathrm{~cm}, Q R=65 \mathrm{~cm} \) and \( P R=4.5 \mathrm{~cm} \)-locate the Point which is equidistant from \( P, Q \) and \( R \) Hence draw a circle passing through \( P, Q \) and \( R \). Measure its radius.

Obitan el centro 4 el radio de la circunferencia crya ecuación es: \( x^{2}+y^{2}-6 x+4 y-3=0 \)

4. L'aire d'un trapezae est de \( 135 \mathrm{~m}^{2} \). On sait également que sa hauteur mesure 9 m et que l'une des bases 13 m . Quelle est la mesure de l'autre base?

- Individua il vertice \( C \) di un triangolo isoscele di base \( A B \operatorname{con} A(-1 ; 1) \) e \( B(2 ; 0) \), sapendo che l'altezza va ad \( A B \) misura \( \frac{\sqrt{10}}{2} \)

Треугольник \( A B C \) вписан в окружность с центром в точке \( O \). Найди \( \angle B A C \), если \( \angle O B C=31^{\circ} \). Ответ дай в градусах.