Step 2: Use the spaces below to complete the formal proof. (7 points) Statements
Reasons
A 30 degrees C-ss
- ss degrees
1. Given
2. Draw point X on AC such that AB = AX 2. Ruler postulate
3. Definition of isosceles triangle
4. m_1 = m 2
As base angles
of 150 Sceles
5. m 2 = m_3+ m2c
6. Substitution
7. Angle addition postulate
8. m2 B = m23 + m2 3+ m2c
9. m2B> m2C
9. Definition of greater than

the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12

7

step-by-step explanation:

ok so what's the question?

step-by-step explanation: