Which layers of earth consist mainly of silicates magnesium oxide?

What is the earth matial ot igneous rock

Which sequence of transformations on preimage ∆abc will not produce the image ∆a'b'c'? a. reflection across the line y = x b. rotation 180° clockwise about the origin followed by a reflection across the line y = -x c. reflection across the x-axis followed by a reflection across the y-axis d. reflection across the line y = -x followed by a rotation 180° counterclockwise about the origin e. reflection across the y-axis followed by a rotation 90° clockwise about the origin

Asegment whose endpoints are points on the edge of the circle are whatps: i ment to put this under geometry i apologize ; ;