Aright triangle has a vertex at point a, a height of 4 units, and a base of 5 units.

use the polygon tool to draw the triangle.

each segment on the grid represents 1 unit.

The triangle is shown in the below diagram.

Step-by-step explanation:

It is given that each segment on the grid represents 1 unit and point A is a vertex of a right angle triangle.

The height of triangle is 4 units, and the base is 5 units.

Let the coordinates of A be (x,y).

There are many possibilities to draw a right angled triangle having height 4, base 5 and vertex at A.

The height of the triangle is 4 units, so the coordinate of another vertex B is (x,y+4).

The base of the triangle is 5 units, so the coordinate of another vertex C is (x+5,y).

The triangle is shown in the below diagram.

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this