How can you prove a triangle is a night triangler
Use the distance formula to see if at least two sides are congruent,
Use the slope formula to see if any sides are perpendicular,
Use the distance formula to see it all three sides are congruent
Use the slope formula to see if any sides are parallel

Use the slope formula to see if any sides are perpendicular

Step-by-step explanation:

A right triangle has a right angle. Two sides form a right angle if they lie on perpendicular lines. If you find the slopes of all sides, then you can use the slopes to see if any two sides are perpendicular.

Use the slope formula to see if any sides are perpendicular

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23

b: |12 – x| ≤ 0.25

step-by-step explanation:      

let x be the possible lengths in inches, of the ribbons jaime cut.

we have been given that jaime is cutting strips of ribbon for a project. he tries to cut each piece to be 12 inches long, but sometimes he cuts it too long or too short by as much as 0.25 inch.  

we can represent this information in an inequality as:

by the definition of absolute value function we will get,

upon combining our inequalities we will get,

therefore, the inequality   describes all the possible lengths (x), in inches, of the ribbons jaime cut.

step-by-step explanation: