Chứng tỏ rằng 2 tia phân giác của 2 góc kề bù vuống góc với nhau

Find the area of an equilateral triangle with a side of 6 inches

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?