A ladder is standing vertically, hard up against a wall. Omer comes and drags the foot of the ladder out 4 metres from the base of the wall. While doing so, he notices the top of the ladder slips down the wall a distance equal to \( 1 / 5 \) of its length. How long is the ladder?

1.1 Perpendicular lines are two lines that form a ___ angle when they intersect. A. Parallet B. 90 degree C. Complementary D. Acute

O circulo tom 8 m de diâmetro e as sementes de rosas que seráo compradas sâo vendidas em pacotes com uma quantidade suficiente para uma área de \( 1,8 \mathrm{~m} 2 \). Considerando que algumas sementes podem näo germinar, será comprado \( 15 \% \) a mals que a quantidade minima necessária. Assim, quantos pacotes de sementes deverào ser comprados? Considere \( \pi=3.1 \).

If a line has a slope of zero, what can be inferred about its equation and graphical representation?

1. Move the slider to choose a scale factor greater than 1. Where is point P'?

1.2 Co-interior angles are A. Obtuse B. Supplementary C. Complementary D. \( 180^{\circ} \)