Use Heron's formula to find the area of the triangle with sides \( a=1.7 \) yards, \( b=2.2 \) yards, and \( c=3.2 \) yards. Round answers to the nearest hundredth. Area \( =\square \) help (numbers)

Problema 3 Un triángulo rectángulo tiene una hipotenusa de 13 cm y una altura relativa a ella de 5 cm . Encuentra las proyecciones de los catetos sobre la hipotenusa.

13. Sean el plano \( \pi \equiv 2 x+k y+z-6=0 \) y la recta \( r \equiv\left\{\begin{array}{l}x=2 t \\ y=2+6 t \\ z=2-4 t\end{array}\right. \) a) ¿Para qué valor de \( k \) la recta es paralela al plano? b) Para \( k=2 \), halla el ángulo que forman el plano \( \pi y \) la recta \( r \).

293. Calcola la misura dell'altezza di un rombo che ha il perimetro di 120 dm e le diagonali di 36 dm e 48 dm . [28,8 d

A ladder is leaning against a wall. If the base of the ladder is 7 meters from the wall and the ladder is 25 meters long, how high up the wall does the ladder reach?

11) Which of the points \( (x, y) \) does NOT lie on the unit circle? a) \( O P(1,0) \) b) \( Q\left(\frac{\sqrt{3}}{2},-\frac{1}{2}\right) \) c) \( O R\left(\frac{1}{3}, \frac{2}{3}\right) \) d) \( \bigcirc s\left(-\frac{3}{5},-\frac{4}{5}\right) \)