^u

Step-by-step explanation:

Top triangle:

The hash marks indicate congruence. So, x is congruent to 15 or x= 15

x+6= 21

The length of the sides of this triangle are 15,15, and 21.

Two sides are congruent so isosceles.

Bottom triangle:

The sum of the angles in a triangle is 180.

30+35+x=180

75+x=180

x=105

105> 90, so this is an obtuse triangle.

Step-by-step explanation:

Top triangle

good luck God bless merry Christmas and happy new year and stay safe and good luck in life! God bless y’all! :)

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.