How do I specify that the constraints in a certain direction are size provision or position constraints? about constraintlayout HOT 3 CLOSED

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="300dp"
    android:layout_height="300dp">

    <ImageView
        android:id="@+id/iv_0"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@id/iv_3"
        app:layout_constraintDimensionRatio="2"
        app:layout_constraintEnd_toStartOf="@id/iv_1"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:src="#fcc"/>

    <ImageView
        android:id="@+id/iv_1"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@id/iv_2"
        app:layout_constraintDimensionRatio="0.5"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@id/iv_0"
        app:layout_constraintTop_toTopOf="parent"
        tools:src="#fcc"/>

    <ImageView
        android:id="@+id/iv_2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="2"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@id/iv_3"
        app:layout_constraintTop_toBottomOf="@id/iv_1"
        tools:src="#fcc"/>

    <ImageView
        android:id="@+id/iv_3"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="0.5"
        app:layout_constraintEnd_toStartOf="@id/iv_2"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/iv_0"
        tools:src="#fcc"/>
</androidx.constraintlayout.widget.ConstraintLayout>