- Baker Lake (Washington) (Wikipedia)
Baker Lake is a lake in northern Washington state in the United States. The lake is situated in the Mount Baker-Snoqualmie National Forest and Baker River valley southwest of North Cascades National Park and is fed by the Baker River along with numerous smaller tributaries. The lake is approximately 10 miles (16 km) north of the town of Concrete, Washington.
- Right angle (Wikipedia)
In geometry and trigonometry, a right angle is an angle of exactly 90 degrees or đ/2 radians corresponding to a quarter turn. If a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles. The term is a calque of Latin angulus rectus; here rectus means “upright”, referring to the vertical perpendicular to a horizontal base line.
