Luas sebuah segitiga sama sisi adalah 389.7 cm². Jika tinggi segitiga sama sisi adalah 25.98 cm, cari perimeter segitiga sama sisi tersebut.​

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

Find two numbers if their sum is 91 and the ratio is 6: 7?

Find the value of x in each case. give reasons to justify your solutions! d q ∈ pr