30 pts pls awnser all questions i give BRAINLIEST help meee

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)

Acompany charges $0.10 for each letter engraved. bobby plans to spend no more than $5.00 on the engraving on a jewelry box. write and solve an inequality to find the maximum number of letters he can have engraved.